<a ng-click="sort(sortvalue)">
  <span ng-transclude=""></span>
  <span ng-show="sortedby == sortvalue">
    <span ng-class="{true: 'glyphicon glyphicon-arrow-up', false: 'glyphicon glyphicon-arrow-down'}[sortdir == 'asc']"></span>
  </span>
</a>


